User's Guide for L3TCFTTrack
Raymond Beuselinck, Imperial College
Introduction
L3TCFTTrack is a CFT track finding tool for Level 3. It finds tracks based
on CFT clusters only.
Sample triggerlist entry
CFTUNPACK L3TCFTUnpack(tooltype=unpack)
CFTTRACK L3TCFTTrack(tooltype=data, UNPACK=CFTUNPACK, ptcut=1.0)
Triggerlist Parameters
- UNPACK
- Name of CFT unpack tool. Currently only L3TCFTUnpack is supported.
- ptcut
Minimum transverse momentum cut for tracking in GeV/c. Default is 1.0.
Minimum allowed value is 0.5. This is an optional parameter.
Algorithm
Track finding is done is two stages. First circular arcs are found in the
x-y plane using a link and tree algorithm. For suitable candidates straight
lines are then constructed in the tan(lambda) - Z plane using an unbinned
Hough Transform method. Further details are given in D0 note 3779.
Status
Tested with Monte-Carlo data on Unix.
$Revision: 1.1 $
$Date: 2000/10/23 19:10:47 $